Henri Wallon

Henri Paul Hyacinthe Wallon (born June 15, 1879 in Paris; died December 1, 1962 in Paris) was a French philosopher, psychologist (in the field of social psychology), neuropsychiatrist, teacher, and politician. He was the grandson of Henri-Alexandre Wallon (whose decisive contribution to the creation of the Third Republic led him to be called the "Father of the Republic").

From Wikipedia: http://en.wikipedia.org/wiki/Henri_Wallon_(psychologist)